CVE-2023-51621 D-Link DIR-X3260 prog.cgi SetDeviceSettings Stack-based Buffer Overflow Remote Code Execution Vulnerability

Medium 6.8 Published 3 May 2024 Updated 2 Aug 2024

Network-adjacent authenticated attackers can execute arbitrary code as root on D-Link DIR-X3260 routers via a stack-based buffer overflow in prog.cgi.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-51621?

CVE-2023-51621 is a medium-severity memory corruption vulnerability in D-Link DIR-X3260, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

D-Link DIR-X3260 prog.cgi SetDeviceSettings Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-X3260 routers. Authentication is required to exploit this vulnerability.

The specific flaw exists within the prog.cgi binary, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of a user-supplied string before copying it to a fixed-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21670.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2023-51621?

It affects 1 product.

Products include Dlink Dir-X3260 Firmware.

How do I fix CVE-2023-51621?

No fix has been published for CVE-2023-51621 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-51621 being exploited?

There is no known exploitation of CVE-2023-51621 in the wild and no public exploit code.

Sources

Also known as GHSA-96m9-cfhw-7gq3.